3E4C

Procaspase-1 zymogen domain crystal strucutre


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.05 Å
  • R-Value Free: 0.263 
  • R-Value Work: 0.200 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Crystal structure of procaspase-1 zymogen domain reveals insight into inflammatory caspase autoactivation

Elliott, J.M.Rouge, L.Wiesmann, C.Scheer, J.M.

(2009) J.Biol.Chem. 284: 6546-6553

  • DOI: 10.1074/jbc.M806121200

  • PubMed Abstract: 
  • One key event in inflammatory signaling is the activation of the initiator caspase, procaspase-1. Presented here is the crystal structure of the procaspase-1 zymogen without its caspase recruitment domain solved to 2.05 A. Although the isolated domai ...

    One key event in inflammatory signaling is the activation of the initiator caspase, procaspase-1. Presented here is the crystal structure of the procaspase-1 zymogen without its caspase recruitment domain solved to 2.05 A. Although the isolated domain is monomeric in solution, the protein appeared dimeric in crystals. The loop arrangements in the dimer provide insight into the first autoproteolytic events that occur during activation by oligomerization. Additionally, in contrast to other caspases, we demonstrate that autoproteolysis at the second cleavage site, Asp316, is necessary for conversion to a stable dimer in solution. Critical elements of secondary structure are revealed in the crystal structure that explain why a dimeric protein is favored after proteolysis at this aspartic acid. Dimer stabilization is concurrent with a 130-fold increase in kcat, the sole contributing kinetic factor to an activated and efficient mediator of inflammation.


    Organizational Affiliation

    Department of Protein Chemistry, Genentech, Inc., South San Francisco, California 94080, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Caspase-1
A, B
302Homo sapiensMutation(s): 1 
Gene Names: CASP1 (IL1BC, IL1BCE)
EC: 3.4.22.36
Find proteins for P29466 (Homo sapiens)
Go to Gene View: CASP1
Go to UniProtKB:  P29466
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
MG
Query on MG

Download SDF File 
Download CCD File 
B
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.05 Å
  • R-Value Free: 0.263 
  • R-Value Work: 0.200 
  • Space Group: P 1
Unit Cell:
Length (Å)Angle (°)
a = 56.100α = 105.95
b = 58.004β = 119.60
c = 60.120γ = 92.77
Software Package:
Software NamePurpose
PHASERphasing
SCALEPACKdata scaling
HKL-2000data collection
REFMACrefinement
HKL-2000data reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2008-12-30
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Advisory, Refinement description, Version format compliance